diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5311fc63..76adb3d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
-## [5.1.8] - 2024-04-??
+## [5.1.8] - 2024-04-18
 
-* added handling of _*/cluster_heartbeat/id*_ to the _*libmicrohttpd*_ HTTP server
+* added handling of _*/cluster_heartbeat/id*_ to the _*libmicrohttpd*_ HTTP server part
 * server-side optimisations: removed the Unix pipe and the accompanying request/response POSIX threads from three WebSocket event loop functions: <_*ws_event_loop*_>, <_*video_event_loop*_> and <_*pv_event_loop*_>
 * upgraded the _*libx265*_ library version
 
diff --git a/src/version.h b/src/version.h
index 2e6c018b..00340e30 100644
--- a/src/version.h
+++ b/src/version.h
@@ -2,7 +2,7 @@
 
 #define VERSION_MAJOR 5
 #define VERSION_MINOR 1
-#define VERSION_SUB 7
+#define VERSION_SUB 8
 
 #define STR_HELPER(x) #x
 #define STR(x) STR_HELPER(x)